new EntityCluster(optionsopt)
Defines how screen space objects (billboards, points, labels) are clustered.
Parameters:
Name | Type | Attributes | Description | |||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
options |
Object |
<optional> |
An object with the following properties:
Properties
|
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Members
clusterBillboards :Boolean
Gets or sets whether clustering billboard entities is enabled.
Type:
- Boolean
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clusterEvent :Event
Gets the event that will be raised when a new cluster will be displayed. The signature of the event listener is
EntityCluster~newClusterCallback
.
Type:
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clusterLabels :Boolean
Gets or sets whether clustering labels entities is enabled.
Type:
- Boolean
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clusterPoints :Boolean
Gets or sets whether clustering point entities is enabled.
Type:
- Boolean
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enabled :Boolean
Gets or sets whether clustering is enabled.
Type:
- Boolean
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minimumClusterSize :Number
Gets or sets the minimum number of screen space objects that can be clustered.
Type:
- Number
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pixelRange :Number
Gets or sets the pixel range to extend the screen space bounding box.
Type:
- Number
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Methods
destroy() → {undefined}
Destroys the WebGL resources held by this object. Destroying an object allows for deterministic
release of WebGL resources, instead of relying on the garbage collector to destroy this object.
Unlike other objects that use WebGL resources, this object can be reused. For example, if a data source is removed from a data source collection and added to another.
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Returns:
- Type
- undefined
Type Definitions
newClusterCallback(clusteredEntities, cluster)
A event listener function used to style clusters.
Parameters:
Name | Type | Description |
---|---|---|
clusteredEntities |
Array.<Entity> | An array of the entities contained in the cluster. |
cluster |
Object | An object containing billboard, label, and point properties. The values are the same as billboard, label and point entities, but must be the values of the ConstantProperty. |
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Example
// The default cluster values.
dataSource.clustering.clusterEvent.addEventListener(function(entities, cluster) {
cluster.label.show = true;
cluster.label.text = entities.length.toLocaleString();
});